/**
 * Copyright 2009 Sergio Bossa
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package com.googlecode.actorom.impl.core.reactor.green;

import com.googlecode.actorom.impl.core.reactor.MessageDemultiplexer;
import com.googlecode.actorom.impl.core.reactor.MessageHandle;
import com.googlecode.actorom.impl.core.reactor.MessageQueue;
import java.util.LinkedList;
import java.util.List;
import net.jcip.annotations.NotThreadSafe;

/**
 * @author Sergio Bossa
 */
@NotThreadSafe
public class GreenMessageDemultiplexer implements MessageDemultiplexer {

    private final List<MessageHandle> selectedMessages;

    public GreenMessageDemultiplexer() {
        selectedMessages = new LinkedList<MessageHandle>();
    }

    public void select(MessageQueue messageQueue) throws InterruptedException {
        messageQueue.readInto(selectedMessages);
    }

    public List<MessageHandle> acquireSelectedMessages() {
        return selectedMessages;
    }

    public void releaseSelectedMessages() {
        throw new UnsupportedOperationException();
    }

    public void wakeUp(MessageQueue messageQueue) {
        throw new UnsupportedOperationException();
    }
}
